설치후 오류좀 해결좀해주실분 ㅜ.ㅜ

Warning: include_once(./lib/mw.session.db.lib.php) [function.include-once]: failed to open stream: No such file or directory in /home/hosting_user/jkwang/public_html/common.php on line 142

Warning: include_once() [function.include]: Failed opening './lib/mw.session.db.lib.php' for inclusion (include_path='.:/usr/local/server/php/lib/php') in /home/hosting_user/jkwang/public_html/common.php on line 142

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_user/jkwang/public_html/common.php:142) in /home/hosting_user/jkwang/public_html/head.sub.php on line 32

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_user/jkwang/public_html/common.php:142) in /home/hosting_user/jkwang/public_html/head.sub.php on line 34

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_user/jkwang/public_html/common.php:142) in /home/hosting_user/jkwang/public_html/head.sub.php on line 35

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_user/jkwang/public_html/common.php:142) in /home/hosting_user/jkwang/public_html/head.sub.php on line 36

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_user/jkwang/public_html/common.php:142) in /home/hosting_user/jkwang/public_html/head.sub.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /home/hosting_user/jkwang/public_html/common.php:142) in /home/hosting_user/jkwang/public_html/head.sub.php on line 38

이러게나오는데 ... 오류점 해결점해주세요 ㅠㅠ